package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import java.util.List;

@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;
    
    //新增套餐,同时需要保存套餐和菜品的相关联系
    @Transactional
    public void saveWithDish(SetmealDTO setmealDTO){
        Setmeal setmeal=new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //向套餐表插入新的数据
        setmealMapper.insert(setmeal);
        //获取生成的套餐id
        Long setmealId=setmeal.getId();
        List<SetmealDish> setmealDishes=setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish->{
            setmealDish.setSetmealId(setmealId);
        });
        //保存套餐和菜品的关联关系
        setmealDishMapper.insertBatch(setmealDishes);
    }
    //分页查询
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO){
        int pageNum=setmealPageQueryDTO.getPage();
    int pageSize=setmealPageQueryDTO.getPageSize();
        PageHelper.startPage(pageNum,pageSize);
        Page<SetmealVO> page=setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());

    }
    @Transactional
    public void deleteBatch(List<Long> ids){
        ids.forEach(id->{
            Setmeal setmeal=setmealMapper.getById(id);
            if(StatusConstant.ENABLE==setmeal.getStatus()){
        //起售的套餐不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        });
        ids.forEach(setmealId->{
            //删除套餐中的数据
            setmealMapper.deleteById(setmealId);
            //删除套餐菜品关系表中的数据
            setmealDishMapper.deleteBySetmealId(setmealId);
        });
    }

 //修改套餐
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //1.修改套餐包,执行update
        setmealMapper.update(setmeal);
        //套餐id
        Long setmealId=setmealDTO.getId();
        //2.删除套餐和菜品的关联关系,操作setmeal_dish表,执行delete
        setmealDishMapper.deleteBySetmealId(setmealId);
        List<SetmealDish> setmealDishes=setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        //3.重新插入套餐和菜品的关联关系,操作setmeal_dish表,执行iinsert
        setmealDishMapper.insertBatch(setmealDishes);
    }


    //根据id查询套餐和套餐菜品关系
    public SetmealVO getByIdWithDish(Long id) {
        Setmeal setmeal = setmealMapper.getById(id);
        List<SetmealDish> setmealDishes=setmealDishMapper.getBySetmealId(id);
        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }
    //套餐起售停售
    public void startOrStop(Integer status,Long id){
        //起售套餐时,判断套餐内是否有停售菜品,有停售菜品`提示"套餐包含未起售餐品,无法起售"
if(status==StatusConstant.ENABLE){
    List<Dish> dishList=dishMapper.getBySetmealId(id);
    if (dishList!=null&&dishList.size()>0){
        dishList.forEach(dish -> {
            if (StatusConstant.DISABLE==dish.getStatus()){
                throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);

            }
        });
    }

}
Setmeal setmeal=Setmeal.builder()
        .id(id)
        .status(status)
        .build();
setmealMapper.update(setmeal);
    }
    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }
    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }


}
